/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.cloud.ai.example.model;

import reactor.core.publisher.Flux;

import org.springframework.ai.chat.model.ChatModel;
import org.springframework.ai.chat.model.ChatResponse;
import org.springframework.ai.chat.prompt.Prompt;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.nio.charset.StandardCharsets;

@RestController
@RequestMapping("/ai")
public class ChatModelController {

    private final ChatModel chatModel;

    public ChatModelController(ChatModel chatModel) {
        this.chatModel = chatModel;
    }

    @GetMapping("/chat")
    public String chat(String input) {
        ChatResponse response = chatModel.call(new Prompt(input));
        return response.getResult().getOutput().getContent();
    }

    @GetMapping(value = "/stream", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
    public Flux<String> stream(String input) {
        return chatModel.stream(new Prompt(input))
                .map(response -> {
                    String content = response.getResult().getOutput().getContent();
                    // 确保返回的内容是正确的编码格式
                    return new String(content.getBytes(StandardCharsets.UTF_8), StandardCharsets.UTF_8);
                });
    }

}
